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Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n= 4 to the n= 1 principal energy level. Recall that for hydrogen En= -2.18 x 10^-18 J(1/n2) (h= 6.63 x 10^-34 J x s)
Suppose a black-body chamber is constructed from 55.8 g (one mole) of iron and heated to 500 K. Classical theory and the observations of Dulong and Petit indicate that the total energy of vibration of iron atoms is 3RT per mole.
Calculate the change in internal energy of the following system: a 100.0- bar of gold is heated from 25 to 50 during which it absorbs 322 of heat. Assume the volume of the gold bar remains constant.
If the most common monosaccharides have the formula C6H12O6, why do the resulting disaccharides have the formula C12H22O11, rather than C12H24O12?
a liter of solution contains 0.140 M Ca+2 and 0.140 M Pb+2. They are to be seperated using chromate (CrO4-2) to selectively precipitate out one metal.
how are observations and testable experiments used to distinguish whether something is a theory
gold forms a substitutional solid solution with silver. compute the weight percent of gold that must be added to silver
Question- it requires 419 kj/mol to ionize potassium atoms from a 0 to a +1 oxidation state. What is the value of n for the electron being removed in this process. Calculate Z for potassium atoms
If 8.32 grams of methanol, CH3OH, are dissolved in 10.3 grams of water, what is the mole fraction of methanol in the solution?
Methanol undergoes combustion in oxygen to make Carbon Dioxide Gas & Liquid Water. Find Standard Enthalpy of Reaction?
How to do I calculate the pH of original buffer given mass of NaC2H3O2*H2O (FW =136 g/mol) = 3.507 gafter measuring out 8.8 mL of 3.0 M acetic acid to add to the beaker containing the sodium acetate. Then put in 55.6 mL of distilled water with the..
a gas at 350k and 12 atm has a molar volume 12 larger than that calculated from the perfect gas law. calculate a the
Using the reduction potentials given, calculate the equilibrium constant,K, at 25 degrees Celsius for the reaction.
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